Story: What would have happened if Pettigrew had never went to Voldemort but had stayed faithful. How would our beloved Harry have turned out? Will he make the same friends? End up in Gryffindor? Will he become the jerk that Snape always thought he was? No seriously I can't think how he would have, so please adopt this fic. Dumbledor still has to be nosey and try to get the Potters to leave Harry with the Dursleys, thoughit's your choice whether or not he goes there or not. Nevilles parents can't become vegetables from the Cruciatus curse however and I would prefer a meeting between Harry and Hermione before they go to Hogwarts. They don't have to be friends, just meet.
Couples and their kids:
All the same as in the book.
You can give anyone who is not in a relationship a partner.